The diagonal is a line that runs from one corner of a square and rectangle to an opposing corner via the figure’s centre. A square with two diagonals is the same size as another. The Diagonal Formula is used to compute the polygon diagonals. A line connecting two non-adjacent vertices of a polygon is called a diagonal.

**Diagonal of a Rectangle Formula is D = √(l****2****+ w****2****)**

**Diagonal of Rectangle**

Rectangles are similarly to squares in that they have two diagonals as well. Their diagonals are also equal and cut each other in half. If the diagonal bifurcates a rectangle, two congruent right triangles form. The diagonal formula of the rectangle can be used to determine the diagonal of a rectangle if the dimensions of all its edges are known.

**Properties of Diagonals of Rectangle**

A rectangle’s diagonal is a line segment formed between the rectangle’s opposing corners. The characteristics of a rectangle’s diagonals are as described in the following:

- A rectangle’s two diagonals were identical. In other words, the diagonals are all the same length.

- The two diagonals cut the rectangle in half and divided it into two equivalent portions.

- The Pythagoras theorem is used to find the length of a rectangle’s diagonal.

- The angles of a rectangle just at the centre become an obtuse angle and an acute angle whenever the opposite sides intersect.

- A square formed by two diagonals intersects at 90 degrees.

- The hypotenuse of such triangles has been the diagonal of the rectangle, which divides the rectangle into two right-angled triangles.